Effects Of Foreign Currency Movements (Schedule Of Foreign Currency Exchange Rate Effect Before Tax) (Detail) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2012 PLN / US$ [Member] USD ($)	Jun. 30, 2012 RUR / US$ [Member] USD ($)	Jun. 30, 2012 EUR-Polish Zloty [Member] USD ($)	Jun. 30, 2012 EUR-Polish Zloty [Member] EUR (€)
Effects Of Foreign Currency Movements [Line Items]
Value of notional amount	$ 459	$ 264	$ 541	€ 430
Pre-tax impact of a 1% movement exchange rate	$ 4.6	$ 2.6	$ 5.4